Concrete-form board



c. E. SPALDING.

CONCRETE FORM BOARD. APPLICATION FILED MAY 28, I920- Patented June '28, 1921 0 a 2 a (m 7 g 4/ C L y if a? 9 j 1 W IN V EN TOR.

Ckzuakli. BY 5 A TTORNE Y.

UNITED STATES PATENT OFFICE.

- outrun a sPmING, or RICHMOND, oanmonmu commence-roam BOARD.

To all whom itmay cancer-nu- Be it known that I, CLAUDE EigSPALr-DING, a citizen of. United States, residing at: Rich.- mond,in the county of Gontra (Iost'a and State ofCalifornia, have invented. new and useful Improvements in Concrete Form Boards,;of which the following is a specification. I

This invention relatesto an improvement in forms of the collapsible, type. t

The principal object of thi's invention is to construct a form which may be used in various places and which may be readily. assembledfand disassembled without the usual difliculties now encountered.

Another object of this invention is to produce a form which may be used in concrete construction and the like, and one which is adjustable at, various distances without the necessity of'sawing and fitting, which is now necessary. g

Another object of this invention is to produce a form which may be readily assembled and quickly removed andagain utilized in the formation of, other concrete structures;

A still further object of the invention is to producea form, which is s'imple and reliable 1n operation, cheap to construct, strong and durable and'capable 'ofbeing handledby the most inexperienced labor.

Otherobjects and advantages of the invention will be apparent during the course of the following description;

In the accompanying drawingforming a part of this-invention and in'which like numerals areemployed to designate like parts throughout the same;

Figure 1 isa perspective view of a top 'rail for the form.

Fig. 2 is a section of a form,,having my invention appli'edthereto,

Fig. 8 isa to plain view looking down upon the parts shown in Fig. 2.

In the accompanying drawing wherein for the purpose of illustration is shown a preferred embodimentof my invention, the numeral 5 designates a sill or foundation which is adapted to be placed in contact with the ground, floor orother like supports adjacent to the point Where the-form is to be setup, while strips 6 and 7 areattached to the sill 5 and are spacedone from the other so as to form a groove 8 therebetween.

The numeral 10 designates a form-board having beveled edges 11 and 12, while a Specification of Letters 1Patent. Patented June 28, 1921.

Application filed May 28,

1920, Serial m5. $84,984.

second form boa-rd. 13 is also provided with the beveled edges Hand 15. I I

By referring to 'Fig. 3-,"i't will be noted that theqbeveled edges 12 and 1.5 abut each other, thus" forming a lap joint between the form boards 1Oand 1"3., A form-board- 16 is, provided with a beveled edge 17, which edge is adaptedto abut-the bevelededge 145 of the vform-board 13; It will be noted, however, that this form-boarddfi difl'ersfrom the form-board 13 in that it has an edgel8 formed at right angles to its front and back surfaces-"the purpose. of which: is to allow the mounting of springsl9, 20 and 21 thereon, which springs are held by suitable fastening 'mean's'19;

The numeral 21-" :lesignates a form-board constructed similar to the form-board l6, 2': e.,,having-one vertical flatedge and a vertical' 'beveled edge, which beveled edge is designated "by' the numeral 22 and is adapted to abut the beveled edge on the adjacent form-board23. 'This combination of formboard 'ma'y=becarried outindefinitely, butfor the purpose of illustrating my invention, I believe the simple}illustration and description given is sufficient: a

It will be observed thati'plat'e 24 is attache'dto the form-board '21 in any convenient'marmen- Here I haveshown nails 26 passing through thefplate 24 andinto the form-board 21. This plate 24 is of sufficient width to cover any opening which maybe provided between the vertical sur faces of'form-boards 16 and21- and will also serve to prevent the passage from one side of the" form to the other of concrete before it has becomesolidified. 1 Referring to Fig. 1 it will-be notedthat I'have constructed a grooved member*27of two parallel pieceshaving' spacer28 there"- between. This grooved member 27 is' adapted to be placed} upon the tops of the fo1imboards :21 so as to holdthe same in proper alinement. The actionof my form-boards is as follows: I

Assuming it'isdesired to build a form 5 feet 3 inches long, and the form-boards are 6'inches in width,it wouldtake ten and a fraction boards under ordinary conditions. By usingmy form boards and two formboards having an expansion joint therebetween I am able to accommodate for the odd size of 5 feet and 3 inches. The same is true under all conditions; it merely being'necessary to insert one or more expansive joints to care for various conditions.

In operation the form-boards are setup as shown in Fig. 2 and the expansion of springs 19, 20 and 21 causes the beveled edges of the various forms to be brought" into intimate contact one with the other for the purpose of forming a tight joint, and which springs also function asa contracting means therefore, details of which function will be hereinafter described. i

When the form is assembled, cement may be poured against the form boards and easily separated from the form proper. The

extraction ofone of the form-boards will thus allow the remaining boards to come away from the cement without difliculty or mutilation. The sill 5' and strip 6 maybe left in the air space which exists' between the respectivewalls constructed by means of my improved form. V v

It will be noted that this form maybe employed where the usualform is cumbersome, expensivetotransport and in many instances unobtainable; and it will befurther evidentthat there is here provided a form which maybe placedupon the market and sold at a very-reasonable price. 1

Thus it will be-seen that by employing the combination of the beveledboards inconjunctionwithsprings and a metal plate, I have provided not only a novel-,form,--but also one which owing. to the contraction and expansion of thie spring elements allows firstly the construction-of a compact form, and secondly the easy extraction of vthe boards so that they may be used when desired when setting up for another form.

Attention is called to the fact thatI' have herewith shown only one form, but it is t( be understood that this form is tobe used in conjunction with another form of similar configuration, which two forms serve to construct an inner wall. By the em'ployment of these forms I have overcome the objec tions experienced by builders in the use of hollow concrete blocks, for the blocks in use today have been anything but satisfactory owing to the expense entailed in-laying out the-same, and the additional fact that water will pass through the concrete blocks and accordingly' dampen the inner walls when the blocks are. joined together, unless a moisture-proof plastic is utilized. 7 It will be apner wall is constructed, the additional ex- -pense incurred by the necessity of a moisture-proof plastic is avoided, and yet the innerwall can be preserved in an absolutely dry state. It will furthermore be apparent that by the provision of an air space'between the walls, there will be afforded by the application of 'my improved form a building construction which is ,cooler in summerand warmer winter. g Y

Itzis to be understood that. the form ofmy inventionv herewith shown and described, is to taken as a preferredexample of the same, and that varlous changes in the shape, size and arrangementof parts may be resorted to without departing from thespirit of the invention or the. scope of the subjoinedrclaims," a Having, thu'sidescribed the, invention, I claimz-e, I l

1. In a form,a sill, parallelmembersattached to saidfsill, a series jof form b'oards having beveled edges-formed onisaid boards, and expansion meansfor keeping the beveled edgesof saidboards incontact one with the'other and for allowing an easy, extractionof said form-hoards i ,j 2; In a form,"a .sill, paralle1 membersat tached to said sill,'form-'boards having their lower ends positionedgon said sill, beveled edges provided on said form boards-, a pair of intermediate form-boards having a sin 'gle beveledfedgeand single vertical flat edge, a groove member..adapted toiengage the upper ends of said form-boards and said intermediate boards, and 1 expansion ,means being adapted to. keep said beveled edges of said'form-boards to, contactpne with the other and to allowan easy extraction of said form-boards. Y .1,

"3. In a form, aysill, parallel membersattached to said:sill,.form boardshaving their lower ends positioned on said sill; beveled edges providedon said form-boards, a pair of intermediate form-boards having a single beveled edge and a single vertical fiat edge, a groove member adapted to engage the upper ends ofisai'd form-boards and said intermediate boards, expansion'means-b'etween' saidvertical flat faces, said expansion means being adapted togkeep said beveled edges of said, form-boards to contact one with the other and tojallow an easy extraction-of said form-boards, and a plate adapted to be attached to one of said intermediate boards and to over-laptheother .of said intermediateboards. j a

In testimony whereof I a-ihx my signature.

CLAUDE n. sP DINe; 

